Fluid mixing apparatus

ABSTRACT

A mixing apparatus for controlling the mixing of hot and cold water and controlling the volume of discharge of the mixture water. A single control lever provides accurate adjustment of both the temperature of the mix and the amount or volume of the water discharged.

United States Patent Wayne K. F airchild 1106 S. Pacific Ave., Santa Ana, Calif.

[72] Inventor 211 Appl.No. 732,124

[22] Filed May 27, 1968 [45] Patented Feb. 9, 1971 [54] FLUID MIXING APPARATUS 11 Claims, 11 Drawing Figs.

[52] US. Cl 137/6254, 137/6363 [51] lnt.Cl Fl6k ll.00 [50] FieldolSearch 137/625.4, 359, 374, 802, 607, 637.4, 636.3; 4/191, 192, 194; 85/38; 251/261 [56] References Cited UNITED STATES PATENTS 1,516,000 11/1924 Clark 251/261 2,519,448 8/1950 Fairchild 137/607 2,966,928 1/1961 Fairchild 137/607 1,335,946 4/1920 WatRous... 4/194 1,728,492 9/1929 Kaufman 4/191 1,948,971 2/1934 Meyer 137/798X 2,616,327 11/1952 Karitzky..... 85/3 3,190,306 6/1965 315616161. 137/359x FOREIGN PATENTS 633,836 1/1962 Canada 137/607 511,989 10/1920 F181'1Ce.... 137/607 1,528,902 6/1968 France 137/6254 Primary Examiner-M. Cary Nelson Assistant Examiner-Michael O. Sturm Attorney-J. Carroll Baisch ABSTRACT: A mixing apparatus for controlling the mixing of hot and cold water and controlling the volume of discharge of the mixture water. A single control lever provides accurate adjustment of both the temperature of the mix and the amount or volume of the water discharged.

PATENTEDF EB sum 3,561,480

SHEET 2 BF 2 IN VENTOR FLUID MIXING APPARATUS BACKGROUND OF THE INVENTION l. Field of the Invention This invention relates generally to fluid flow control means and relates more particularly to a mixing valve for mixing varifined thereto.

2. Description of the Prior Art As' is well known, various problems are involved and difficulties encountered in the provision of a suitabletrouble-free mixing valve for various types of installations, such as household sinks, bathroom wash basins, bathtubs, laundries and the like.

For example, one of the problems of prior art types of mixing valves is that of easy and quickassembly, and easy and quick disassembly for servicing, repair, or replacement of parts.

Also, such prior art mixing valves or faucets have. a great many parts and are complicated in construction and consequently relatively expensive to manufacture.

Another problem of prior art mixing valves is that of providing a simple and effective means for preventing cross flow of water between the hot and cold water inlet pipes.

Such prior art mixing faucets or valves are difficult to install, considerable time and labor being required for this purpose and the plumber or person installing them must get underneath the basin or the like.

BRIEF SUMMARY OF THE INVENTION The present invention is a mixing valve or faucet having an extremely simple diaphragm valve arrangement for controlling the mixing of the hot and cold water and an outflow control valve which in itself prevents cross flow of water between the hot and cold ports when the valve is in the closed position.

A single control lever mechanism controls the hot and cold water ports and also the outlet valve which regulates or controls the discharge of water from the faucet. When the water pressure to the mixing valve is off the control lever can be easily removed from the cam member for adjusting the positions of the hot and cold inlet valves for controlling the tem- ADVANTAGES AND OBJECTS OF THE INVENTION The invention may be assembled easily and quickly and can as easily and quickly be disassembled. Access to the flow control valves is easily and quickly effected by turning oh the water to the faucet and removing the control handle, popup rod screw and cover.

Installation of the device is effected quickly and easily by means of the two toggle bolts.

A split ring on top of the hot and cold water valves reduces wear to a minimum and a large center valve prevents crossflow between the hot and cold water ports.

A cross plumb situation is easily taken care of by rotating the housing body 180 and reversing the position of the stop for the cam whereby the hotand cold water valves are positioned.

The characteristics and advantages of the invention are further sufficiently referred to in connection with the following detailed description of the accompanying drawings which represent certain embodiments. After considering these examples, skilled persons will understand that many variations may be made without departing from the principles disclosed and l contemplate the employment of any structures, arrangements or modes of operation that are properly within the scope of the appended claims.

Referring to the drawings, which are for illustrative pur poses only:

FIG. I is a top plan view of a faucet embodying the present invention; a

FIG. 2 is an enlarged side elevational view thereof installed on a lavatory;

FIG. 3 is an enlarged sectional view taken on line 33 of FIG. 1;

FIG. 4 is a sectional view taken on line 4-4 of FIG. 3 with the outlet valve stem out of contact with the actuating cam therefor as when thewater to the faucet is turned off;

FIG. 5 is a fragmentary sectional view showing the stem of the outlet valve in engagement with the operating cam for said valve;

FIG. 6 is a sectional view taken on line 6-6 of FIG. 4 with the cam member for controlling the position of the hot and cold valves and the top plate of the valve housing removed;

FIG. 7 is a similar view but with the valve housing removed;

FIG. 8 is a side elevational view of the mixing cam member;

FIG. 9 is an underside view of the same;

FIG. 10 is a view similar to FIG. 6 with a friction reducing plate disposed on 'top of the hot and cold valve members; and

FIG. I l is a longitudinal sectional view of an alternative diaphragm arrangement.

Referring more particularly to the drawings, the apparatus comprises a base plate; indicated generally at 20, having a horizontal part 22 at the rear, a short upwardly and forwardly inclined part 24 extending from the front edge of the horizontal part 22, a front part 26 extending forwardly and upwardly at a lesser angle than the part 24, and a further frontpart 28 extending forwardly and upwardly from the edge 30 of the part 26 at a slightly greater angle than the part 26.

The horizontal part 22 of the base plate 20 is provided with an opening32 defined by a depending annular flange 34 that is internally threaded for threadable reception of the lower externally threaded part 36 of a tubular locking screw 38 having a head 40 at the upper end. Opening 32 is located centrally relative to the width of the base plate and inwardly of the rear edge thereof. A passage 42 extends longitudinally through the locking screw 38 for a purpose hereinafterdescribed.

. To the top side of the forwardly and upwardly extending from part 38 valve port block 46 preferably of metal, said block being secured to the base plate part 28 by means of screws 48 or by welding or other suitable means.

Valve port block 46 has a hot water inlet port 50, a cold water inlet port 52, and an outlet port 54, said ports being in alignment with each other with the outlet port 54 positioned midway between the inlet ports 50 and 52.

Short sections of hot and cold water inlet pipes 56 and 58 respectively are received in openings provided therefor in the horizontal part 22 of the base plate. These sections of hot and cold inlet water pipes are part of the faucet or mixing valve assembly. Discharge ends of these pipes are received in openings provided therefor in the back side of the port block 46 and are secured therein by welding, soldering or brazing or the like. Passages 60 and 62 provide fluid connections between the respective hot and cold water pipes and the hot and cold water ports 50 and 52.

An outlet pipe 64 has its inlet end secured by soldering, welding or the like in an opening provided therefor in the port block and at the front thereof, the inlet end of said outlet being connected with the outlet port 5 4 by a passage 66 in said port block. The opposite end of said outlet pipe having a discharge nozzle 68 operably secured thereon by any suitable well known means, said nozzle being positioned just forwardly of the forward edge of the base plate part 28 and arranged to discharge water downwardly.

Port block 46 has a rearwardly extending flange 70 and a forwardly extending flange 72 having tapped openings 70a and 72a respectively therein for reception of screws 74 for securing housing body, indicated generally at 76, to said port block 46, said screws being disposed in openings, not shown, in said housing body and aligned with the tapped openings 70a and 72a.

The underside of the housing body 76 is provided with a diaphragm chamber 80 about the periphery of which is a surface 82 for clamping engagement with a marginal portion of a diaphragm, indicated generally at 84, of suitable resilient material such as rubber, natural or synthetic, or plastic or the like. Along the inner, free edge of the surface 82 is a small, downwardly extending flange 86 which presses into the diaphragm to insure against leakage about the peripheral edge of the diaphragm. The diaphragm chamber 80 is of sufficient depth to permit upward flexing of said diaphragm thereinto to permit the flow of water between the hot and cold inlet ports and the outlet port. I

The diaphragm is of sufficient length to extend over and cover the hot and cold inlet ports and, of course, said diaphragm covers the outlet port also.

The upper side of the diaphragm is provided with upstanding, integral pins 88 axially aligned with the respective hot and cold inlet ports. An upstanding, integral boss 90 is also provioed on the upper side of the diaphragm in axial alignment with the outlet port and the under side of the diaphragm is recessed at 91 in axial alignment with the boss 90. The diameter of recess 91 is somewhat greater than that of the outlet port 54 but less than the diameter of the recess'in the outlet valve, described hereinafter.

The valves for the hot and cold water each comprises a cylindrical valve member 94 having a convexly rounded top 96 and an axial bore 98 for reception of the respective pins 88 of the diaphragm, said valve members 94 being of plastic or other suitable material. The valve members 94 are somewhat greater in diameter than the diameter of the inlet ports they control.

The housing body 76 is provided with openings 99 which extend upwardly from the diaphragm chamber 80 and in which the respective hot and cold valve members 94 are slidably disposed.

There is also an outlet valve chamber 100 which extends upwardly from the diaphragm chamber and slidably receives outlet valve member 102 which is provided with a recess 104 in which is disposed the boss 90 upstanding from the diaphragm centrally thereof. The outlet valve chamber 100 is of sufficient height to permit movements of the outlet valve between the closed and the fully open position. An axial bore 106 is provided in the top wall 108 of the valve chamber 100 for slidable reception of stem 110 of the outlet valve, said outlet valve being of brass or other suitable material.

It is to be understood that the diameter of the outlet valve 102 is substantially the same as the width of the diaphragm chamber 80 so that when the valve 102 is closed no water can flow from one inlet port to the other and, hence, cross flow is prevented.

The upper side of the housing body 76 has a recess 112 and has-an axial, upstanding or boss portion 114 of smaller diameter than the diameter of the recess 112, thus defining arcuate recess portions 116, 118 and 120. Arcuate recesses 118 and 120 are separated by a partition 122 which is integral with the housing body. Boss 114 is of less height than the depth of the recess 112 so that the top surface of said boss 1 14 is below the top of recess 112 but in a plane parallel to the top of the housing body. The axial bores 99 for the hot and cold water valve members extend into the recess and separate the arcuate part 116 from the arcuate parts 118 and 120, so that upper end portions of the hot and cold valve members extend upwardly above the floor of recess 112. In other words, the upper end parts of said hot and cold water valves extend upwardly of the bottoms of said recesses 116, 118, and 120. Also, the bore 106 for the stem 110 of the outlet valve 102 extends through the boss 114, so that the upper end portion of said valve stem extends above the top surface of the boss 114.

A cam member, indicated generally at 130, comprises a plate 132 at the lower end which is provided with an integral depending arcuate cam, indicated generally at 134, having its ends parts 136 and 138 spaced arcuately apart. End parts 136 and 138 are the high parts of the cam 134 and are of equal height. From said 'end parts, the cam surface is gradually and oppositely inclined arcuately to the lowermost part diametrically opposite the space between the high parts 136 and 138 and indicated at 140.

The plate 132 of the cam member 13 rests on the boss 114 with the cam 134 disposed in the C-shaped part of the recess 112 of the housing body, said C-shaped part of said recess 112 comprising the arcuate parts 116, 118 and 120. The upper ends 96 of the valves 94 are urged against the cam 134 by water pressure under the diaphragm and as said cam member is rotated the valves 94 are positioned accordingly. The spacing of the end parts 136 and 138 of the cam 134 is greater than the width of the partition 122 and engagement of said partition by one of the end parts on the other limits rotation of the cam member 130. it will be apparent that as the cam member is rotated one of the valves 94 will be moved downwardly while the other will be moved upwardly. The proportional amount of hot and cold water that will flow under the diaphragm 84 and out the outlet port 54 when the outlet valve 102 is in an open position will determine the tempera ture of the water discharged from the faucet.

At the top of the plate 132 is an integral upstanding projection of lug 142 which has a bore 144 therethrough substantially parallel with the plate 132, there being an axial opening or bore 146 from the under side of the plate 132 into said bore 144 of the lug.

The cam member 130 is operably secured in position by a retainer plate which is secured on top of the housing body by screws 74 received in openings provided therefor in said retainer plate. Retainer plate 145 has an opening 147 therein for reception of the upper part or lug 142 of the cam member 130. At the upper side of the plate 132 of the cam member 130 is a cylindrical part 149 of smaller diameter than the plate 132 and slightly smaller in diameter than the opening 147 which in turn is smaller in diameter than the plate 132. Thus plate 132 and cam 134 of the cam member 130 is operably retained in position in the recess 112 of the housing body, the lug 142 of the cam member extending upwardly of the retainer plate 145. A gasket 151 is disposed between the retainer plate 145 and the top surface of the housing body, said gasket having holes provided therein to accommodate the screws 74 and a hole 153 in register with the opening 147 to accommodate the cylindrical part 149 which is thus rotatably disposed in the openings 153 and 147.

A cylindrical control lever or rod has an end portion, indicated generally at 152 that is rotatably disposed in said bore, the opposite end of said control lever 150 having an actuating knob or handle 154 secured to said lever by any wellknown means. 7

End portion 152 of the control lever is provided with an annular groove 158 spaced from the adjacent end of said lever and which extends completely about said lever, said groove spiraling toward the axis of the lever so as to gradually increase in depth, the bottom of the groove providing a cam or cam surface 160. The deepest part of the groove 158 will be termed the inner end of the cam and said inner end terminates in a shoulder 162 extending inwardly from the shallower end of the groove. The free end of the stern 110 of the outlet valve 102 is operably received in the groove 158 and rides on the cam 160 when water to the valve mechanism is turned on. When the outer of highest part of the cam is in engagement with the outer free end of the valve stem 110 of the outlet valve, the outlet valve is in the closed position. Rotation of the lever 150 to rotate the cam 160, so that the free end of the valve stem 110 is in engagement with the inner or lowest end of the cam 160, effects full opening of the outlet valve. It is to be noted that the cam 160 has a flat surface 167, at the inner end of which the free end of valve stem 110 engages when the lever 150 is rotated for full opening of the outlet valve. It will, therefore, be apparent that rotation of the handle and lever on the axis thereof will regulate or adjust the opening and closing of the outlet valve as the position of the cam 160 is varied, when the free end of the outlet valve stem 110 rides on the cam 160 due to the water pressure beneath the diaphragm 84.

There is a groove 164extending from the cam groove 158 to the adjacent end of the lever- 150, said groove 164 being defined by substantially parallel, laterally spaced side walls 168 and a bottom wall 170, one of the walls 168 being in the same plane as the shoulder 162. The groove 164 is not as deep as the inner end 167 of the cam groove so that the sidewall of the cam groove opposite the handle 154, and what is termed the rear wall of the annular cam groove, provides a low shoulder 169.

Thus, the sidewalls 168 serve to retain the valve stem 110 in the cam groove at all times when the water to the valve mechanism is turned on. This is true even when the lever 150 is turned to the fully open position forthe outlet valve 102, since at this position the shoulder 169 preventsthe valve stem 110 from passing into the longitudinal groove 164. When it is desired to remove the lever 150, the water to the faucet is cut off so that there is no pressure beneath the diaphragm 84. Now, with the lever 150 rotated to the fully open position against the tip of the valve stem 110, said valve stem will clear the shoulder 169 so that the control lever 150 may be pulled from the bore 144 of the lug 130, the free end of the valve stem 110 sliding in the longitudinal groove 164. The reverse procedure is used to return the lever 150 to the operative position.

There is a cover, indicated generally at 180,for the abovedescribed mechanism, said cover having an upwardly and slightly forwardly inclined rear wall 182, with a narrow horizontal wall 184 at the upper end of said rear wall 182. Concave sidewalls 186 are at the sides of the horizontal wall 184 and terminate at their lower ends in downwardly and slightly inclined vertical wall parts 188. There is also a top wall part 190 extending upwardly and forwardly from the forward edge of the horizontal wall 184 and said top wall part terminates in a top wall part 192 inclined forwardly and upwardly but at a lesser angle than the top wall part 190. From the sides of the top wall parts 190 and 192 there are depending sidewalls 194 and from the front end of the top wall part 192 is a front wall 198. The cover is a unitary structure with the rear part relatively wide and the front part narrower and tapering somewhat.

The horizontal wall 184 has an opening 200 therein in alignment with the opening 32. The locking screw 38 is received in while the cam 134 determines the positions of said valves. Thus, the mixing of hot and cold water is controlled so that the temperature of the water discharged from the faucet is controlled.

Rotation of lever 150 on its axis determines the position of the outlet valve 102 and adjusts its position between its fully closed and fully open position. Thus, the volume or amount of water discharged by the faucet is determined and it will be apparent that the temperature of the water may be varied without varying the volume of water'diischarged from the faucet and also that the volume of water discharged by the faucet may be varied without changing the temperature thereof.

. When the installation requires a popup valve, a popup rod 208 is slidably disposed in the bore 42 of the locking screw 38, the lower end of said rod 208 being connected to the popup valve of the lavatory or the like in the usual well-known manner. If such rod 208 is not required, a solid locking screw 38 is used.

Installation of the faucet is simple, easy and requires very little time. The inlet pipes are positioned to be accommodated by all standard basins, for example/There are two screws 210 received in holes provided therefor in the horizontal part 22 of the base plate, there being aligned holes in the top wall 213 of the standard basin, indicated at 215, for reception of said screws. Toggle nuts, indicated generally at 212, are of wellknown character and are disposed on said screws 210. Each toggle nut 212 has oppositely extending ears 214 on which oppositely extending levers 216 are pivoted. These levers are yieldingly urged to their extended position by a spring, not shown, and are limited to a substantially horizontal position by engagement of their inner ends with the respective screws on which they are disposed. With the levers 216 in their folded position, the toggle nuts may be inserted through the openings in the basin providedfor securing screws. After the toggle nuts have passed through the basin holes, the levers are urged to their horizontal position by springs of said toggle nuts and one of the levers engages the respective adjacent water inlet pipe, which prevents rotation of the respective toggle nuts. The screws 210 are then tightened and the faucet secured in place without getting under the basin. Only making the water connectionsand connecting the lower end of the popup rod to the popup valve require the person installing the faucet getting under the basin.

the opening 200 as well as the tapped opening 32 and when screwed down the head 40 engages the horizontal wall 184 and exerts pressure thereon to help retain the cover in place on the base plate 20.

Thetop wall part 190 has a relatively large opening 202 therein through which the lug 142 extends, said opening 202 being of somewhat smaller diameter than the plate 132 of the cam member 130, there being a cylindrical part 204 of said cam member 130 at the top of the plate 132 that is slightly smaller in diameter than the diameter of the opening 202. The part 204 of the cam member is operably received in said opening 202 and is rotatable therein,

When the coveris in place and the control lever 150 is operably disposed in the bore 144 of the cam member 130, the cover is held in position by said lever 150 and the locking screw 38. To remove the cover the lever 150 is removed from the bore 144 as above described and the locking screw 38 un-' screwed. The cover 180 may then be lifted off the mechanism. Replacing the cover, the steps above described for removal of the cover are reversed.

Thus, by rotatingthe cam member 130, the hot and cold water valves are adjusted, the water pressure on the underside of the diaphragm urging the valves in the opening direction,

A flat, friction reducing, C-shaped member 220, FIG. 10,

. may be disposed in the peripheral part of the recess 112 on top of the hot and cold water valve members 94 and beneath the cam 140 to thereby eliminate wearing of the valve members 94, since frictional engagement is eliminated between said cam and said valve members. The C-shaped member will tilt or wobble as the cam member is rotated. It is to be noted that the partition 122 is disposed between the ends of the C- shaped member 220.

In FIG. 11 there is shown an alternative diaphragm and valve wherein the hot and cold water valves are indicated at 940 and are integral with the diaphragm which is indicated at 84a.

The invention and its attendant advantages will be understood from the foregoing description and it will be apparent that various changes may be made in the form, construction and arrangement of the parts of the invention without departing from the spirit and scope thereof or sacrificing its material advantages, the arrangement hereinbefore described being merely by way of example and I do not wish to be restricted to the specific form shown or uses mentioned except as defined in the accompanying claims.

lclaim:

l. A mixing and volume control valve, comprising:

A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other;

B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports;

C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber;

D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body;

. an outlet valve member for the outlet port and operably disposed in said housing body; a rotatable cam member operably mounted with respect to valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated; 1

G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing side walls and a bottom wall, the bottom wall of said groovespiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof;

H. the part of the outlet valve member engaging the eam'of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and

. the control lever having a longitudinal groove extending 2. A mixing and volume control valve, comprising: A. a port block having spaced inlet ports for two fluids of different characteristics, andan outlet port between said inlet ports, said ports being in alignment with each other;

B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports;

C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber;

D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of'said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body;

E. an outlet valve member for the outlet port and operably disposed in said housing body;

F. a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated;

G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom walllof said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof;

H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and

. one side of the diaphragm having a pair of upstanding pins and an upstanding boss, said pins and boss being integral with the diaphragm, and inlet valve members and outlet valve member having recesses for reception of said pins and boss, respectively, to thereby retain said valve members in operable position on the diaphragm.

3. A mixing and volume control valve, comprising: A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other;

B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports;

C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber;

D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body;

. an outlet valve member for the outlet port and operably disposed in said housing body;

a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said. cam being lowest, said cam increasingin height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated;

G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove "spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof;

H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control level from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and

. a base plate, said port block being attached to said base plate, said base plate having openings therein for screws for mounting the mixing and volume control valve to a support having openings aligned with the openings in said base plate; fluid inlet pipes adjacent to said openings; screws in said aligned openings; and toggle nuts on said screws, said toggle nuts including pivoted arms which, when extended, engage respective inlet pipes which retain said nuts against rotation.

4. A mixing and volume control valve, comprising:

A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other;

B..a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports;

C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber;

D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body;

B. an outlet valve member for the outlet port and operably disposed in said housing body;

F. a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as I the cam member is rotated;

G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof;

H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure;

I. a base plate; means for attaching the port block to said base plate; and a hollow cover for disposition on said base plate and parts carried thereby, said housing having an opening through which the part 'of the rotatable cam member having the transverse bore extends, the control lever, when disposed in said bore, retaining the cover in position, said cover being removable when said lever is removed from said transverse bore.

5. The invention defined by claim 4, wherein the base plate has a tapped opening therein and said cover has an opening aligned therewith; and a locking screw disposed in said aligned openings, the screw having an externally threaded free end part threadably disposed in said tapped opening.

6. The invention defined by claim 5, wherein said locking screw has a longitudinally extending passage therethrough; and a popup rod slidably disposed in said passage.

7. A mixing and volume control valve, comprising:

A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other;

B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports;

C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber;

D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body;

E. an outlet valve member for the outlet port and operably disposed in said housing body;

F. a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated;

G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjustingthe position thereof;

H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and

. the housing body having a recess in the top side, said recess having a boss therein of smaller diameter than the diameter of said recess; and a partition between said boss and the adjacent part of the housing body thereby providing an arcuate recess portion for operable reception of the cam member, the spacing of the free ends of said cam being greater than the width of the partition so that said cam member may be rotated, said partition being engageable by the ends of said cam thereby providing stop means for limiting rotation of said cam member.

8. A mixing and volume control valve, comprising:

A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other;

B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports;

C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber;

D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body;

E. an outlet valve member for the outlet port and operably disposed in said housing body;

F. a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam pngaging the inlet valve members for adjusting their positions as the cam member is rotated;

G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and fonning a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve memberfor adjusting the position thereof;

H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is openingpressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and

. the outlet valve being of substantially the same diameter as the width of the diaphragm chamber so that when said outlet valve is closed cross flow of fluid between the inlet ports is prevented by said valve.

9. A mixing and volume control valve, comprising: A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other;

B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports;

C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber;

D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body;

an outlet valve member for the outlet port and operably disposed in said housing body;

. a rotatable cam member operably mounted with respect G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof;

H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening'p'ressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and

l. a friction-reducing member disposed between the inlet valves and the cam of the rotatable cam member.

10. The combination of:

A. a valve mechanism;

B. a support having openings therein;

C. securing means having;

a. a securing means part engaging a part of said valve mechanism;

b. the securing means part being actuatable from the valve side;

c. a second securing means part cooperable with the first mentioned securing means part;

d. a stop means engageable by the second securing means part when the first mentioned securing means part is actuated thereby tightening said securing means to secure the valve mechanism to the support; and

D. the part of the securing means engageable with said part of the valve mechanism comprises a screw, the second part being a toggle nut restrained against rotation when the screw is rotated by engagement with said stop means.

11. The invention defined by claim 10, wherein the support comprises a basin with at least one opening therein and said part of the valve mechanism comprises a base having-holes therein aligned with the openings in the basin; the part of the respective securing means engaging the base bein a screw extending through respective a igne holes of the ase and the openings in the basin, the second part of the securing means engaging being a toggle nut, and the stop means comprises a pipe connected with the valve mechanism. 

1. A mixing and volume control valve, comprising: A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other; B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports; C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber; D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body; E. an outlet valve member for the outlet port and operably disposed in said housing body; F. a rotatable cam member operably mounted with respect to valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated; G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing side walls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof; H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and I. the control lever having a longitudinal groove extending longitudinally from the inner end of the spiral groove to the shallowest part of said cam groove being spaced axially inwardly relative to the bottom of the longitudinal groove to provide a shoulder engageable by said part of the outlet valve when there is fluid pressure on said diaphragm, said part of the outlet valve being slidable from the cam groove through the longitudinal groove for removal of the control lever from the transverse bore of the cam member and replacement thereof when fluid pressure is cut off from the outlet valve.
 2. A mixing and volume control valve, comPrising: A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other; B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports; C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber; D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body; E. an outlet valve member for the outlet port and operably disposed in said housing body; F. a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated; G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof; H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and I. one side of the diaphragm having a pair of upstanding pins and an upstanding boss, said pins and boss being integral with the diaphragm, and inlet valve members and outlet valve member having recesses for reception of said pins and boss, respectively, to thereby retain said valve members in operable position on the diaphragm.
 3. A mixing and volume control valve, comprising: A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other; B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports; C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber; D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body; E. an outlet valve member for the outlet port and operably disposed in said housing body; F. a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated; G. a control lever having at least a part rotaTably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof; H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control level from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and I. a base plate, said port block being attached to said base plate, said base plate having openings therein for screws for mounting the mixing and volume control valve to a support having openings aligned with the openings in said base plate; fluid inlet pipes adjacent to said openings; screws in said aligned openings; and toggle nuts on said screws, said toggle nuts including pivoted arms which, when extended, engage respective inlet pipes which retain said nuts against rotation.
 4. A mixing and volume control valve, comprising: A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other; B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports; C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber; D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body; E. an outlet valve member for the outlet port and operably disposed in said housing body; F. a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated; G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof; H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; I. a base plate; means for attaching the port block to said base plate; and a hollow cover for disposition on said base plate and parts carried thereby, said housing having an opening through which the part of the rotatable cam member having the transverse bore extends, the control lever, when disposed in said bore, retaining the cover in position, said cover being removable wheN said lever is removed from said transverse bore.
 5. The invention defined by claim 4, wherein the base plate has a tapped opening therein and said cover has an opening aligned therewith; and a locking screw disposed in said aligned openings, the screw having an externally threaded free end part threadably disposed in said tapped opening.
 6. The invention defined by claim 5, wherein said locking screw has a longitudinally extending passage therethrough; and a popup rod slidably disposed in said passage.
 7. A mixing and volume control valve, comprising: A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other; B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports; C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber; D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body; E. an outlet valve member for the outlet port and operably disposed in said housing body; F. a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated; G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof; H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and I. the housing body having a recess in the top side, said recess having a boss therein of smaller diameter than the diameter of said recess; and a partition between said boss and the adjacent part of the housing body thereby providing an arcuate recess portion for operable reception of the cam member, the spacing of the free ends of said cam being greater than the width of the partition so that said cam member may be rotated, said partition being engageable by the ends of said cam thereby providing stop means for limiting rotation of said cam member.
 8. A mixing and volume control valve, comprising: A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other; B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports; C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber; D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlEt ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body; E. an outlet valve member for the outlet port and operably disposed in said housing body; F. a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated; G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof; H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening pressure on said outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and I. the outlet valve being of substantially the same diameter as the width of the diaphragm chamber so that when said outlet valve is closed cross flow of fluid between the inlet ports is prevented by said valve.
 9. A mixing and volume control valve, comprising: A. a port block having spaced inlet ports for two fluids of different characteristics, and an outlet port between said inlet ports, said ports being in alignment with each other; B. a housing body removably attached to said port block and having a diaphragm chamber facing the port block and encompassing said ports; C. a flexible diaphragm disposed between said housing and port block and overlying said ports, said diaphragm being adapted to flex into said diaphragm chamber; D. a pair of inlet valve members carried by parts of the diaphragm aligned with the inlet ports, said inlet valve members being at the opposite diaphragm chamber side of said diaphragm, there being one valve member for each inlet port, operably disposed in bores provided therefor in said housing body; E. an outlet valve member for the outlet port and operably disposed in said housing body; F. a rotatable cam member operably mounted with respect to said valve members, said cam member having a port with a transverse bore therein and having an arcuate cam of generally C shape with the ends of said cam spaced apart, the center of said cam being lowest, said cam increasing in height toward the free ends, said cam engaging the inlet valve members for adjusting their positions as the cam member is rotated; G. a control lever having at least a part rotatably disposed in said transverse bore of the cam member, the part of said control lever disposed in said transverse bore having an annular, external cam groove therein, defined by spaced and facing sidewalls and a bottom wall, the bottom wall of said groove spiraling inwardly toward the axis of said lever and forming a cam terminating at its inner end in a shoulder, said spiral cam engaging a part of the outlet valve member for adjusting the position thereof; H. the part of the outlet valve member engaging the cam of the control lever, being engaged by a sidewall of the cam groove, preventing longitudinal removal of the control lever from the transverse bore of the cam member when there is opening pressure on sAid outlet valve, said lever being disengageable from said outlet valve part when said outlet valve is relieved of said opening pressure; and I. a friction-reducing member disposed between the inlet valves and the cam of the rotatable cam member.
 10. The combination of: A. a valve mechanism; B. a support having openings therein; C. securing means having; a. a securing means part engaging a part of said valve mechanism; b. the securing means part being actuatable from the valve side; c. a second securing means part cooperable with the first mentioned securing means part; d. a stop means engageable by the second securing means part when the first mentioned securing means part is actuated thereby tightening said securing means to secure the valve mechanism to the support; and D. the part of the securing means engageable with said part of the valve mechanism comprises a screw, the second part being a toggle nut restrained against rotation when the screw is rotated by engagement with said stop means.
 11. The invention defined by claim 10, wherein the support comprises a basin with at least one opening therein and said part of the valve mechanism comprises a base having holes therein aligned with the openings in the basin; the part of the respective securing means engaging the base being a screw extending through respective aligned holes of the base and the openings in the basin, the second part of the securing means engaging being a toggle nut, and the stop means comprises a pipe connected with the valve mechanism. 